Re: Eotech/ Back Up sight Question
Basically any standard height flip ups should work, rears are generally designed to work with a fixed front sight, fronts are designed to work with those rears, there are models for mounting on railed gas blocks and models for mounting on forearm rails figure out which you need and make sure the one you get is right. Eotech offers standard and lower 1/3rd model sights, this has nothing to do with the height of the BUIS. I believe there are some LP models designed for some oddball AR-like rifles they will say so in the descriptions, avoid those.
Troy windage is supposed to be hard to adjust, its A1 style, if you use your rifle hard your windage will never be inadvertently adjusted. Adjust elevation on the front. Troy's flip up BUIS are designed as combat sights, not match rifle sights, they are meant to be set and left alone. Troy appears to be the only manufacturer designing their sights to ride neglected on a rifle and be in adjustment after many rides in vehicles, cases, and anywhere else the rifle may move against something which I find happens allot in the real world.